THE USE OF TIME-RESOLVED X-RAY-DIFFRACTION AND SAMPLE TECHNIQUES FOR STUDYING THE MUSCLE STRUCTURE DURING RELAXATION

The use of the modern time-resolved X-ray diffraction and sample techn ique has played an important role in studying muscle structures during contraction at various physiological conditions. We represent time-re solved X-ray data on equatorial diffraction and tension response of th e frog sartorius muscle during relaxation. The measurements of the tim e-course of the intensity change of reflections (1,0), (1,1) and the b ackground under them give a possibility to study the effect of potenti ation of contraction by repetitive stimulation in fresh and tired musc les. Model calculations of meridional diffraction patterns for Various configurations of cross-bridges in the relaxation phase were carried out.